Al-Kāfi
Hadith 5988ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنِ الْحَجَّالِ عَنْ عَلِيِّ بْنِ عُقْبَةَ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلام) قَالَ إِنَّ الْمُؤْمِنَ أَخُو الْمُؤْمِنِ عَيْنُهُ وَدَلِيلُهُ لا يَخُونُهُ وَلا يَظْلِمُهُ وَلا يَغُشُّهُ وَلا يَعِدُهُ عِدَةً فَيُخْلِفَهُ.
8. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad ibn ‘Isa from al-Hajjal from Ali ibn ‘Uqbah from Abu ‘Abdillah (a.s.) who has said the following: “The believer is the brother (in belief) of the believer, his eyes and his guide. He does not violate his trust, does not do injustice to him, does not deceive him and does not promise him only to ignore it later on.’”